The secondary advertisement is provided to the secondary device.

The secondary device is synchronized to the primary device such that an audiovisual data stream of the primary device is adjustable through the secondary device.

The mobile device comprises a primary device (1) and a secondary device (2).

The method includes sending to the client device, the navigation instructions for the secondary device, and a request to forward the navigation instructions to the secondary device.

The system is composed of a child device (300) which the user carries and a parent device (200) radio-communicatable with the child device (300) bidirectionally.

A connector facilitates a secondary device connecting to the elevator wiring.

The secondary device can receive a signal periodically from the primary device.

The secondary advertisement is to be presented on a secondary device at a same time that the primary advertisement is presented on the primary device.

The disclosed subject matter provides a main device and at least one secondary device.

A method of authentication and synchronous interaction between a secondary device and a multi-perspective audiovisual data stream broadcast on a primary device geospatially proximate to the secondary device is disclosed.

The present disclosure relates to an electrical system comprising a primary device and secondary device.

The secondary device includes a graphical user interface which may be controlled from the primary device.

It shall only be possible to engage the secondary locking device if the primary device is properly engaged.

It shall only be possible to engage the secondary locking device if the primary device is properly engaged.

The presence of a tuned secondary device detunes the local anti-resonance on the primary surface; thereby enable the RF power to be transferred from the local primary coils to the secondary device.